Recent content by les étoiles

hmm, the question did ask specifically for a point on the surface. But they said the surface was conducting. Is the placing of the image I have done only for grounded surfaces?

oh yes the dipole moment points upwards, sorry for leaving that out. I skipped a few steps, the first dipole makes an angle larger than 90 degrees. So the cosine of the angle gives the negative times the cosine of theta in the diagram. If the first dipole points up, the image dipole should...

well, \theta is the same since both triangles are similar, and the directions of \hat{r} and \hat{\theta} are taken into account in expressing E_x . Is this right?

Yes it was a mistake, it was supposed to be E_{dip} I was trying to determine if the x-component cancels before moving on to the y. But I was stuck. I don't get you about the origin. It seems as though I have considered the origin to be at the point of the dipoles when computing their...

Homework Statement An point electric dipole is located a vertical distance h above an infinite plane. What is the horizontal distance d from the dipole such that the electric field is zero at the horizontal distance d from the point dipole? Homework Equations...